Description
Airman SDG400S-8E1 Mobile Diesel Generator Overview
The Airman SDG400S-8E1 is a high-capacity trailer-mounted diesel generator rated at 400 kVA prime and 420 kVA standby. It supports switchable three-phase and single-phase output, runs on a Tier 4 Final Isuzu 6WG1X engine, and provides 21.3 hours of runtime at full load. It is intended for industrial operations, disaster response and large construction projects.
Delta Demand Excitation gives the generator strong motor-starting capability and lets it adjust automatically to varying loads. A DSEGenset digital control panel provides real-time diagnostics, and a lockable voltage selector switch keeps the output setting secure. External fuel tank connections and curbside access make routine maintenance simpler.
The unit rides on an integrated trailer with a GVWR of 19,602 lb and a trailer weight of 2,650 lb, and an external fuel tank connection kit is included. Full electrical, fuel and dimensional data is listed in the specifications table.
Single-phase voltages run from 120V up to 277V and three-phase voltages from 208V up to 480V, with rated three-phase current of 1,048 A at 208V and 962 A at 240V. A 491-gallon fuel tank supports the long runtime. Operating weight is 17,042 lb with a dry weight of 13,206 lb, and without the trailer the generator measures 177 x 59 x 107.5 inches.
Key Features
- 400 kVA prime and 420 kVA standby ratings
- Tier 4 Final Isuzu 6WG1X diesel engine rated 457.7 HP at 1,800 RPM
- 21.3 hours of runtime at full load from a 491-gallon fuel tank
- Delta Demand Excitation for motor starting and load-following behavior
- Digital control panel with advanced diagnostics
- External fuel tank connections and curbside access for maintenance
- Lockable voltage selector switch for secure operation
Who It’s For
A fit for industrial sites, disaster response teams and large construction operations that need a high-output mobile generator with three-phase and single-phase options, plus the ability to connect external fuel tanks.
Specifications
| Model Number | SDG400S-8E1 |
| Prime Power | 400 kVA / 320 kW |
| Standby Power | 420 kVA / 336 kW |
| Engine | Isuzu 6WG1X: 457.7 HP @ 1,800 RPM |
| Voltage: Single Phase | 120V / 127V / 139V / 240V / 254V / 277V |
| Voltage: Three Phase | 208V / 220V / 240V / 416V / 440V / 480V |
| Amperage: 3 Phase 208V | 1,048 A |
| Amperage: 3 Phase 240V | 962 A |
| Amperage: 1 Phase 240V | 50 A x 3 |
| Runtime @ Full Load | 21.3 hours |
| Fuel Tank Capacity | 491 gal |
| EPA Emission Level | Tier 4 Final |
| Operating Weight | 17,042 lbs |
| Dry Weight | 13,206 lbs |
| GVWR | 19,602 lbs |
| Trailer Weight | 2,650 lbs |
| Dimensions (W/O Trailer) | 177″ L x 59″ W x 107.5″ H |
| Dimensions (With Trailer) | 270″ L x 92″ W x 127″ H |
| Warranty | Manufacturer Warranty |
| Prop 65 | WARNING: Cancer and Reproductive Harm: www.P65Warnings.ca.gov |
Buying advice: read our guide to how long a generator can run, or compare all diesel generators.
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